R1161x SERIES
3-MODE 300mA LDO REGULATOR
NO.EA-106-0511
OUTLINE
The R1161x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply
current, and low ON-resistance. Each of these voltage regulator ICs consists of a voltage reference unit, an error
amplifier, resistors for setting output voltage, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage and a chip enable function. To prevent the destruction by over
current, current limit circuit is included. The R1161x Series have 3-mode. One is standby mode with CE or
standby control pin. Standby mode realizes ultra small consumption current off mode. Other two modes are
realized with ECO pin . Fast Transient Mode (FT mode) and Low Power Mode (LP mode) are alternative with
ECO pin . Consumption current is reduced at Low Power Mode compared with Fast Transient Mode. Output
voltage is maintained between FT mode and LP mode.
The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are
SOT-23-5, SON-6, and HSON-6, high density mounting of the ICs on boards is possible.
FEATURES
Ultra-Low Supply Current .................................Typ. 3.5 A (Low Power Mode, V
OUT
<1.6V),
Typ. 80 A (Fast Transient Mode, V
OUT
<1.8V)
Typ. 60 A (Fast Transient Mode, V
OUT
1.8V)
Standby Mode ...................................................Typ. 0.1 A
Low Dropout Voltage.........................................Typ. 0.48V(I
OUT
300mA Output Voltage 1.0V Type)
Typ. 0.31V(I
OUT
300mA Output Voltage 1.5V Type)
Typ. 0.23V(I
OUT
300mA Output Voltage 3.0V Type)
High Ripple Rejection .......................................Typ. 65dB(f 1kHz, FT Mode)
Low Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/ C
Excellent Line Regulation .................................Typ. 0.01%/V (at Fast Transient Mode)
High Output Voltage Accuracy .......................... 2.0%( 3.0% at LP Mode)
Small Package ................................................SOT-23-5 (Super Mini-mold), SON-6, HSON-6
Output Voltage ..................................................Stepwise setting with a step of 0.1V in the range of 0.8V to
3.3V is possible
Input Voltage .....................................................Min. 1.40V(V
OUT
1.0V)
Min. 1.45V(V
OUT
<1.0V)
Built-in fold-back protection circuit ....................Typ. 50mA (Current at short mode)
External Capacitors...........................................C
IN
C
OUT
Tantalum 1.0 F (V
OUT
<1
.
0V)
C
IN
C
OUT
Ceramic 1.0 F (V
OUT
1.
0V)
APPLICATIONS
Precision Voltage References.
Power source for electrical appliances such as cameras, VCRs and hand-held communication equipment.
Power source for battery-powered equipment.
1
R1161x
BLOCK DIAGRAM
R1161xxxxA
ECO
R1161xxxxB
ECO
V
DD
V
OUT
V
DD
V
OUT
Vref
Current
Limit
Vref
Current
Limit
CE
GND
CE
GND
R1161xxxxD
ECO
V
DD
V
OUT
Vref
Current
Limit
CE
GND
2
R1161x
SELECTION GUIDE
The output voltage, the chip enable polarity, package type, and the taping type for the ICs can be selected at
the user's request. The selection can be available by designating the part number as shown below;
R1161xxxxx-xx
a b a'c d
Code
a, a'
Part Number
Contents
Designation of Package Type :
R1161Nxx1x-xx:SOT-23-5 (Mini-mold)
R1161Dxx1x-xx:SON-6,
R1161Dxx2x-xx:HSON-6
Setting Output Voltage (V
OUT
) :
Stepwise setting with a step of 0.1V in the range of 0.8V to 3.3V is possible.
Designation of Chip Enable Option :
A:"L" active type.
B:"H" active type.
D:"H" active and with auto discharge function
Designation of Taping Type : TR
Refer to Taping Specifications
b
c
d
3
R1161x
PIN CONFIGURATIONS
SOT-23-5
Top View
5
4
SON-6
Bottom View
4
5
6
HSON-6
Top View
6
5
4
Bottom View
4
5
6
6
5
4
(mark side)
1
1
2
3
2
3
3
2
1
1
2
3
3
2
1
PIN DESCRIPTIONS
SOT-23-5
Pin No
1
2
3
4
5
Symbol
V
DD
GND
CE
or CE
SON-6, HSON-6
Pin Description
Input Pin
Ground Pin
Chip Enable Pin
MODE alternative pin
Output pin
Pin No
1
2
3
4
5
6
Symbol
V
DD
NC
V
OUT
ECO
GND
CE
or CE
Pin Description
Input Pin
No Connection
Output pin
MODE alternative pin
Ground Pin
Chip Enable Pin
ECO
V
OUT
* Tab in the
parts have GND level.
(They are connected to the reverse side of this IC.)
Do not connect to other wires or land patterns.
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
ECO
V
CE
V
OUT
I
OUT
P
D
P
D
P
D
Topt
Tstg
Input Voltage
Input Voltage(ECO Pin)
Input Voltage(
CE
/CE Pin)
Output Voltage
Output Current
Power Dissipation(SOT23-5)*
Power Dissipation(SON-6)*
Power Dissipation(HSON-6)*
Operating Temperature Range
Storage Temperature Range
Item
Rating
6.5
-0.3 ~ 6.5
-0.3 ~ 6.5
-0.3 ~ V
IN
+0.3
350
420
500
900
-40 ~ 85
-55 ~ 125
C
C
mW
Unit
V
V
V
V
mA
* ) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
4
R1161x
ELECTRICAL CHARACTERISTICS
R1161xxxxA
Symbol
V
OUT
I
OUT
V
OUT
/
I
OUT
V
OUT
/
I
OUT
V
DIF
I
SS1
Item
Output Voltage
Output Current
Load Regulation(FT Mode)
Load Regulation(LP Mode)
Dropout Voltage
Supply Current(FT Mode)
Conditions
V
IN
Set V
OUT
1V,V
ECO
V
IN
1 A I
OUT
30mA
Note 1
V
IN
Set V
OUT
1V,V
ECO
GND
1 A I
OUT
30mA
Note 2
V
IN
V
OUT
1.0V
V
IN
Set V
OUT
1V,V
ECO
V
IN
1mA I
OUT
300mA
Min.
0.98
(-30mV)
0.97
(-45mV)
300
40
Typ.
Max.
1.02
(30mV)
1.03
(45mV)
70
Topt=25 C
Unit
V
V
mA
mV
I
SS2
Supply Current(LP Mode)
Istandby Supply Current (Standby)
V
OUT
/
V
IN
V
OUT
/
V
IN
RR
V
IN
V
OUT
/
Topt
Ilim
R
PU
R
PD
V
CEH
V
CEL
V
EN
Line Regulation(FT Mode)
Line Regulation(LP Mode)
Ripple Rejection(FT Mode)
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE
Pull-up Resistance
ECO Pull-down Resistance
CE
, ECO Input Voltage “H”
V
IN
Set V
OUT
1V,V
ECO
GND
15
30
mV
1mA I
OUT
100mA
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
V
IN
Set V
OUT
1V
80
111
A
V
ECO
V
IN
,
V
OUT
<1.8V
V
IN
Set V
OUT
1V
60
90
A
V
ECO
V
IN
,
V
OUT
1.8V
V
IN
Set V
OUT
1V,
3.5
8.0
A
V
OUT
<1.6V,V
ECO
GND
V
IN
Set V
OUT
1V
4.5
9.0
A
V
OUT
1.6V,V
ECO
=GND
0.1
1.0
V
IN
V
CE
Set V
OUT
+1V, V
ECO
=GND
A
Set V
OUT
0.5V V
IN
6.0V
0.01
0.15
%/V
I
OUT
30mA, V
ECO
V
IN
Set V
OUT
< 0.9V: 1.4V V
IN
6.0V
Set V
OUT
0.5V V
IN
6.0V
0.05
0.20
%/V
I
OUT
30mA, V
ECO
GND
Set V
OUT
<0.9V:1.4V V
IN
6.0V
f 1kHz, Ripple 0.2Vp-p
65
dB
V
IN
Set V
OUT
1V
I
OUT
30mA, V
ECO
V
IN
1.4
6.0
V
ppm
I
OUT
30mA
100
/C
40 C Topt 85 C
50
mA
V
OUT
0V
1.87
5.00
12.00
M
1.87
1.0
0.0
30
5.00
12.00
6.0
0.3
M
V
V
Vrms
CE
, ECO Input Voltage “L”
Output Noise
BW 10Hz to 100kHz
Note1: 30mV tolerance for V
OUT
Note2: 45mV tolerance for V
OUT
1.5V.
1.5V.
5
